When Wall Street goes to work in the morning, it is overwhelmingly men who pour onto the trading floors, men who slap on their headsets, fire up their flashing computer displays, and go to war.

Could that be part of the problem that sent Wall Street over a cliff and the U.S. economy into an epic tailspin? Maybe.

Wall Street loves testosterone, and testosterone loves risk. Even stampedes. New regulations are in the works. But some are saying maybe it’s endocrine diversity that the Street needs. A hormone rebalance.

Joining us from London is John Coates, senior research fellow in neuroscience and finance at the University of Cambridge. He researches the interplay of the endocrine system and financial risk-taking, and formerly ran a derivatives trading desk for Deutsche Bank New York.